Measures the normal pressure of the air at sea level. It is used in watchmaking to indicate water-resistance.

Sometimes referred to as Hesolite, an acrylic crystal is made up of plastic composite that is generally less expensive and less durable than a sapphire or a mineral crystal. It's flexible, mallea [..]

A device that makes an alerting sound at a preset time. Alarm watches can be either quartz or mechanical.

A function, commonly found in pilot watches or inside a pressurized airplane cabin, that shows altitude by responding to changes in barometric pressure.

A watch that has a dial, hands, numbers, or other types of markers that present a total display of 12 hours.

Small openings carved into the watch that display certain indications, such as the date or hour. Some apertures may only be visible when the watch dials are in certain positions.

Currently, the most accurate timekeeping devices on earth. These are accurate to 1 second in 1,400,000 years. This information is broadcast throughout the day from a radio transmitter in Ft. Collins, [..]

Provided by the U.S. National Institute of Standards and Technology, Time and Frequency Division in Boulder, Colorado, atomic time is measured through vibrations of atoms in a metal isotope that resem [..]

Measures the distance between the case lugs. Therefore, band width may not necessarily be the exact width of the watch band, as a bracelet or strap can have tapering widths. When swapping watch bands [..]

Generically, the upper part of the watch body. Specifically, it usually refers to a ring that goes around the outside of the crystal. On jewelry watches, for instance, the bezel may contain a ring of [..]